Work machine

Abstract

A work machine includes a lower structure, a slewing upper structure attached to the lower structure via a slewing mechanism, an attachment, including at least a boom, and attached to the slewing upper structure, a boom cylinder configured to drive the boom, a work tool attached to the attachment, and a controller. The controller includes a weight calculating part configured to measure a weight of a transporting object to be transported by the work tool, based on a boom cylinder pressure of the boom cylinder, and a vibration control part configured to generate a command for reducing vibration of the attachment.

What is claimed is: 
     
         1 . A work machine comprising:
 a lower structure;   a slewing upper structure attached to the lower structure via a slewing mechanism;   an attachment, including at least a boom, and attached to the slewing upper structure;   a boom cylinder configured to drive the boom;   a work tool attached to the attachment; and   a controller,   wherein the controller includes   a storage device configured to store a program, and   a processor configured to execute the program to perform a process including
 calculating a weight of a transporting object to be transported by the work tool, based on a boom cylinder pressure of the boom cylinder, and 
 generating a command for reducing vibration of the attachment. 
   
     
     
         2 . The work machine as claimed in  claim 1 , wherein the calculating calculates the weight of the transporting object when the vibration of the attachment is less than or equal to a predetermined threshold value. 
     
     
         3 . The work machine as claimed in  claim 1 , wherein the generating generates a command with respect to a solenoid relief valve provided in a hydraulic circuit configured to supply a working fluid to the boom cylinder. 
     
     
         4 . The work machine as claimed in  claim 1 , wherein the generating generates a command with respect to a control valve configured to control a working fluid to be supplied by the boom cylinder. 
     
     
         5 . The work machine as claimed in  claim 4 , wherein
 the control valve is a controlling valve operated by a pilot pressure, and   the generating generates a command with respect to a solenoid valve provided in a pilot line that inputs the pilot pressure to the control valve.   
     
     
         6 . The work machine as claimed in  claim 4 , wherein
 the control valve is a solenoid controlling valve, and   the generating generates a command with respect to the control valve.   
     
     
         7 . The work machine as claimed in  claim 1 , wherein
 the work tool is a lifting magnet, and   the generating generates a command for controlling a supply voltage with respect to the lifting magnet.   
     
     
         8 . The work machine as claimed in  claim 1 ,
 wherein the generating supplies a working fluid from the boom cylinder to another hydraulic actuator that forms a combined operation with the boom.